html {
    background-color: gray;
}

body {
    padding: 50px 10px;
    margin: 0 auto;
    width: 90vw;
    min-height: calc(100vh - 100px);
    background-color: white;
    font-family: sans-serif;
    text-align: center;
}

hr {
    margin: 30px auto;
    width: 80%;
    background-color: black;
    height: 2px;
}

main {
    margin: 0 auto;
}

section {
    text-align: center;
    padding: 50px 5px;
    vertical-align: top;
    display: inline-block;
    min-height: 100px;
    width: 30%;
}

ul {
    text-align: left;
    list-style: inside;
    padding-left: 10px;
}